why does my Toyota RAV4 XA50 (2019-2024) check engine light keep coming on?

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface and the engine is turned off.
• Gather necessary tools and parts before starting.

2. Address Error Codes

• Connect the OBD-II scanner and retrieve the trouble codes.
• Research the codes to determine the exact issue (e.g., P0420 for catalytic converter efficiency).

3. Check and Replace Gas Cap

• Inspect gas cap for cracks or wear.
• If damaged, replace with OEM or equivalent gas cap and ensure it is tightened properly.

4. Inspect and Change Engine Oil

• Remove the oil dipstick and check oil level and condition.
• If oil is low or dirty, drain the old oil and replace it with the manufacturer-recommended oil.
  • Use an oil filter wrench to remove the old filter and replace it with a new one.
  • Torque the new oil filter to manufacturer specifications.

5. Inspect Exhaust System

• Visually inspect the exhaust system from the manifold to the tailpipe for any signs of corrosion or leaks.
• If any damage is found, replace the affected components, ensuring proper sealing with gaskets.

6. Check Air Intake System

• Remove the air filter and inspect for dirt and blockages.
• Replace the air filter if dirty.
• Inspect intake hoses for cracks or loose fittings and secure or replace as necessary.